/Engine/Source/Runtime/SlateCore/Public/Layout/Geometry.h
Create a child geometry+widget relative to this one using the given LayoutGeometry.
The new child geometry.
[FArrangedWidget](API\Runtime\SlateCore\Layout\FArrangedWidget) MakeChild ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > & ChildWidget, const [FLayoutGeometry](API\Runtime\SlateCore\Layout\FLayoutGeometry) & LayoutGeometry ) const